Steam-turbine power unit



Sept. 22, 1925. 1,554,593

C. A. PARSONS ET AL STEAM TURBINE POWER UNI'T Filed June 4f 192s 4 sheets-sheet 1 Fig.1.

' /N VEN TOES C mamas A. PAesms, ALFKEO Q.GA2NEG!E Sept. 22, 1925.

c. A. PARSONS ET AL STEAM TURBINE POWER UNIT Filed June 4, 1923 4 Sheets-Sheet 2 llwfi/vfores: QHAQLES A. p/mso Fig.6.

ALFRED Q.CAQME65E.

Sept. 22, 1925.

v A 1,554,593 6. A. PARSONS ET AL.

STEAM TURBINE f PowER UNIT Filed June 4, 1923 4 Sheets-$11691: s

MAMMM Sept. 22, 1925.

c. A. PARSONS ET AL STEM TURBINE POWER UNIT 4 Sheets-Shee at 4 Filed Juno 4, 192a vENTms Mamas/ 1. PAresMg Patented Sept. 22, 1925.

, em-em, ENGLhNi snlb criminals ASSIGNOR r sari) rhn'sotfs.

swam-rename enn,

aspiration filed mine 4,

, To all w'iwm itfmay concern: a

, Be 'itlrnown thatwe, CHARLES Anennrron Parsons and Arman QUINTIN CARNEGIE, both British "subjects and both "residing at Heaton Works, Newcastle on-"il yhe, r in the county ,of, 'Northuniberland, England, 7 have invented certain new and hseiulrlmprovements in fSteam Turbine Power "Units, of which the following is "a specification.

This invention relates'to "steanrpower installations having "highepressure and lowpressure turbines 'and particularly to Thighpower 'units of "this kind used for driving alternators. i

i The invention coiisists in tlie particular combinations o f e1etm'ents hereinafter described and particularly pointed" out in the claims. v

. Referringto the accoinpanyiflg' drawings, which form part of the "specification Figure l"-s'hot vs" nutsiue elevatio'n of one form of'the "invention "which the -'hig*h- Figure 2 'bei'ng'a seet'i'c al eievafiidn showing theconical duct and certain adjacent partstoa'largerscale, his

Fi ureA is {a 'cross 'sectio'n bathe line 4+r 4ef F igure 2;- y

Figure 5 shows an subside" elevatien or a modification in which the high-pressure and low-pressure turbine shafts are of) axiall, while finally m Figure 6 is a sectional elevation showing the conical duct and adjacent parts to a larger scale, and

Figure 7 a cross-section on the line 7'7 ofFigure 6.

Where desirable corresponding parts in the different forms of the invention are indicated in the drawings by the same reference symbols.

In carrying the invention into effect according to one form as illustrated in Figures 1 to 4, a high-speed, high-pressure turbine, a, is connected to the lowspeed, lowpressure turbine, I), by way of gearing, 0, the whole power so developed serving to drive the alternator, d. The exhaust from the high-pressure turbine, a, passes through a special duct, 6, which takes the form of a hollow asymmetrical truncated cone, the generatrices of which are straight lines While the centre of the two base circles lie ed "orpartly-supportedon the pedestal,

:an aperture, 7, is-iormed in'the upper part of'this duot to' -a iiord accessto the gearingand bearings and -,pern1it the removal of certain of these parts. a y

In 'some cases, 'theficonical anew, may. be divided into :a T-niimber o'cf cellsby radial webs, Z, i (see Figure? 4') Whichserve to transmititlie iIlo'a-d carried bythe bearings A enc aged in "the'duct to thesu'pportingdeet on "its outer wall.

Theyexhaust "from "the *l'owapressure turbine which comprises f'o'nly asmall "number of rings of blades, tpasses'through'the"duct,

mar wll' know n torm into tlie 'condenser,

n, placed below the turbine.

According toamodification'io f'thie inventiohftsee Figures 15,- ?6 and 7) the-h'iighpressure turbine, a,'-de-velopi-ng fihe hulk of "the 7 power as:-before,"'diiives 'its' own ialternator, djwhi le-the lowpressure turbine, t,- in 5 turn drives asrnal-ler alternator; d-. *I'n*tl1i-s-forn1 of the invention the highrspeed shaft,7 and the lowspeedshaftyhnmay" be co a'xialfl'their ends r'being 'in juxtaposition as fshowm and supported in appropriate bearings encaged Within the conical duct, e, which in this case takes the form of a truncated right circular cone.

Turbine installations of the kind described and illustrated above have a high thermal efiiciency while at the same time the relative arrangement of the conical duct and the parts within it tends to compactness and reduction in weight; in particular, owing to the comparative shortness of the duct connecting the two turbines, mechanical and thermal losses due to the transfer of steam from turbine to turbine are reduced to a minimum.

Having now described our invention, what we claim as new and desire to secure by Letters Patent is 1. In combination, turbines arranged end to end, said turbines each having a stator casing and a rotor member disposed therewithin; duct means in rigid association with adjacent stator casings for leading working fluid from one of said casings to the next and bearings for said rotor members encaged within said duct means. v

2. In combination, turbines arranged endto end, said turbines each having .a stator casing and a rotor member disposed therewithin; duct means in rigid association with adjacent stator casings for leading working fluid from one of said casings to the next; bearings for said rotor members and gearing operatively connecting them, said bearings and gearing being encaged within said duct means. I

3. In combination, turbines arranged :end to end, said turbines each having a stator casing and a rotor .member disposed therewithin; duct means having a conoidal formation in rigid association with adjacent stator casings for leading working fluid from one of said casings to the next and bearings for said rotor members encaged within said conoidal duct means.

4. In combination, turbines arranged end to end, said turbines each having a stator casing and a rotor member disposed therewithin; duct means having aconoidal formation in rigid association with adjacent stator casings for leading working fluid from one of said casings to the next; bearings for said rotor members and gearing operatively connecting them, said bearings and gearing being encaged within said conoidal duct means.

5. In combination, turbines arranged end to end, said turbines each having a stator casing and a rotor mounted on its own separate shaft and conoidal duct means in rigid association with adjacent stator casings for leading working fluid from one of said casings to the next. i Y

6. In combination, turbinesarranged end to end, said turbines each having a stator casing and a rotor member disposed there- Within; duct means in rigid association with ad acent stator casings for leading Working fluid from one of said casings to the next and bearings for said rotor members encaged within and supported by said duct means.

7 In combination, turbines arranged end to end, said turbines each having a stator casing and a rotor member disposed there- Within; duct means having the form of a conoidal annulus in rigid association with adjacent stator casings for leadingrworking fluid from one of said casings to the next and bearings for said rotor members encaged within said conoidal annulus. f

8. In combination, turbines arranged end to end, said turbines each having a stator casing and a rotor member disposed therewithin; ductmeans havingtlie form of a conoidal annulusin rigid association with adjacent stator casings for leading working fluid from one of said casings to the next and bearings for said rotor members encaged within said conoidal annulus, said annulus having an aperture through the Walls thereof to provide access to said bearings.

In testimony whereof wehave signed our names to this specification. j

CHARLES ALGERNON PARSONS.

ALFRED QUINTIN CARNEGIE. 

